Work & Energy — Set 2

What is the dimensional formula of energy?

Efficiency of a machine is defined as?

How much work is done in lifting a 5 kg mass vertically by 2 m? (Take g = 10 m/s^2)?

Work done by friction on a moving body is generally?

One horsepower is approximately equal to?

In a perfectly elastic collision of an isolated system, which quantity is conserved?

A 1 kW device runs for 2 hours. How much energy does it consume in kWh?

In uniform circular motion, the work done by the centripetal force is?

Gravitational potential energy of a body is taken as zero at?

Which formula represents work done by a constant force?